Head to head
karpathy-skills vs ECC (Everything Claude Code)
karpathy-skills and ECC (Everything Claude Code) solve the same job (Planning & reasoning), so this is a pick-one decision. karpathy-skills is our default here: Cheapest quality win on the entire list. One file, no install, works alongside everything else. 'Surgical Changes' alone stops the drive-by refactors that break a working layout while fixing something unrelated.
Quick read
- Editor's pick: karpathy-skills.
| Field | karpathy-skillsgithub.com Not yet swept | ECC (Everything Claude Code)github.com Not yet swept |
|---|---|---|
| What it is | A ~65-line CLAUDE.md built around four LLM coding failure modes Karpathy identified. Adds no tools — it changes how the agent decides: surface assumptions before coding, refuse speculative abstraction, keep diffs scoped, define a verifiable stopping condition. ~203k stars. | The largest harness here by volume: 68 agents, 285 skills, 94 slash commands, a security scanner for prompts and configs, session memory, and a browser-based Plan Canvas. Coordinates a fixed lifecycle: plan → test → implement → review → verify → remember → improve. ~241k stars. |
| Category | Planning & reasoning | Planning & reasoning |
| Cost tier | free | free |
| Pricing | Free | Free |
| Why builders pick it | Cheapest quality win on the entire list. One file, no install, works alongside everything else. 'Surgical Changes' alone stops the drive-by refactors that break a working layout while fixing something unrelated. | Powerful but maximal — installing this and superpowers and gstack at once means three competing methodologies. Pick one harness. |
| Watch out for | not logged | not logged |
| How to wire it up | curl -o CLAUDE.md .../main/CLAUDE.md | /plugin marketplace add https://github.com/affaan-m/ECC |
| Editor's pick | Yes | No |
Other matchups worth running
Agent endpoint: GET /api/public/compare?slugs=ecc,karpathy-skills